Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
  • C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D17/00—Pigment pastes, e.g. for mixing in paints
  • C09D17/002—Pigment pastes, e.g. for mixing in paints in organic medium
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers

Definitions

• the object of the present invention is a formulation of a nanoscale colour preparation and production method thereof; allowing improving the stability of the nanoscale colour preparations, so that they are maintained under suitable conditions for use for a period not less than 12 months.
• This invention is applicable to the manufacture of nanoscale colour preparations for paints and the like.
• nanoscale preparations are formulated with the following basic elements: pigment, wetting agent-dispersant, binder resin and solvent.
• the dispersants are composed of polymers with functional groups related to the pigment, notable examples being: Solsperse 17,000 from Lubrizol, Ltd., Byk 108 (Byk Chemi), Efka 207 (Efka), and the like.
• the amount to be used depends on the pigment and/or filler, with the ranges of use, according to the data provided by the manufacturers of these additives, being: Inorganic pigments 1 - 2 % Organic pigments 15 - 20 % Black and/or high-surface pigments 40 - 80 %
• Solvents are a combination of aromatic naphtha with butyl acetate, butanol, methoxypropyl acetate (MPA), and the like; in these applications being used solvents with a flash point below 55 °C. In the traditional system, it is prevented during the dispersion of pigment from exceeding 40 °C due to the evident risk of inflammation of the solvent, which also limits the quality of dispersion.
• Pigments comprise the range from white to black, being mostly organic, except the two mentioned.
• the ratio of nanoscale paste is 10 to 30 % to the total amount of product.
• Nanoscale colour pastes mentioned have a limited stability and are converted into final product by adding binder, solvents and surface additives, in a short time, usually between immediate and 30 days, the existence of background relating to the obtaining of nanoscale pastes that remain stable for a greater period of time being unknown to the applicant of the invention.
• the invention includes a formulation of a nanoscale colour preparation and production method thereof, with characteristics oriented towards to obtain a nanoscale colour preparation with improved stability of at least 12 months, avoiding that the final product should be prepared in a relatively short time, such as with currently known colour pastes.
• the nanoscale colour paste of the invention includes in its formulation: pigments, wetting agent - dispersant, resin and solvent, being characterized by using said components in percentages by weight specified below: between 12 and 24 % pigments; between 12 and 24 % wetting agent-dispersant; between 30 and 40 % solvent; and between 12 and 46 % resin and by using a solvent with a flash point above 65 °C, allowing the dispersion of the pigment particles at a temperature of between 50 and 60 °C, without the risk of inflammation, with much greater efficiency and a better final dispersion than those achieved in the state of the art.
• the solvent used is a combination of butyl glycol acetate, with 2-ethoxy ethyl ether and aromatic naphthas.
• the production method of nanoscale colour preparations of the invention with the components listed above includes:
• the milling of the product is carried out with grinding balls with a size of the range of particle size to be obtained.
• ultrasounds are used in both the initial and final phase.
• Higher flash point solvents are used to operate above 55 °C-60 °C.
• the amount of wetting agents-dispersants is 200- 225 % higher compared to that used in conventional methods, but added in two steps: In the first step the particle of pigment "D50" of 50-75 micron is reduced, to the margin of 0.2 to 0.4 micron ("D50" means that half of the particles are in this range).
• the dispersion is stabilized by the addition of, roughly, the same amount at a temperature higher than normal (+10 °C to +15 °C) and the dilution is maintained for a period of time greater than 30-60 minutes.
• the stability test is done by measuring the viscosity within 24 hours and after 72 hours at 50 °C. Not supported an increase exceeding 75%, measured in cps (centipoises).
• a first step the whole pigment and resin, and half of the solvent and the wetting agent-dispersant are put in a suitable tank; that is:
• Ultrasounds are applied for 30 minutes, keeping the temperature between 40 °C and 60 °C.
• the milling of the product takes place in closed-loop with loopback during 8-15 hours.
• the dispersion obtained is diluted in a proper tank with the remaining amounts of solvent and wetting agent-dispersant, that is, with:
• This mixture is subjected to reduced stirring (100-150 r.p.m) for 80 minutes. Ultrasounds are applied to the final mixture to achieve a maximum homogenisation. It is finally filtered with ceramic filter to remove particles above 0.5 microns.

Landscapes

• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Pigments, Carbon Blacks, Or Wood Stains (AREA)

Applications Claiming Priority (1)

Publications (2)

Family

ID=54331789

Family Applications (1)

Country Status (2)

Cited By (1)

Family Cites Families (9)

• 2015
  • 2015-06-24 WO PCT/ES2015/000082 patent/WO2015162317A1/es active Application Filing
  • 2015-06-24 EP EP15782660.3A patent/EP3315568A4/de not_active Withdrawn

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